W 638-2RS1
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 638-2RS1
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.028 kg
Tolerance class
P0
Seal type
Sealed
For load direction
Radial
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.009mm to 0
Width
9 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
892 lbf
Radial static load rating
441 lbf
Limiting speed
19 X 1000 rpm
Lubrication
Grease
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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W 638-2RS1 Bearing Product Overview & Core Advantages
The W 638-2RS1 is a metric single row deep groove ball bearing designed for exceptional reliability in demanding applications. This sealed bearing features a robust stainless steel construction for all components, providing excellent corrosion resistance. Its primary strength lies in its ability to handle radial loads efficiently, making it an ideal choice for compact spaces requiring high precision and durability. The integrated seals and pre-applied grease ensure long-term, maintenance-free operation.
W 638-2RS1 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| W | Stainless Steel Bearing Series |
| 638 | Bore Diameter: 8 mm |
| 2RS1 | Bearing with contact seals on both sides |
W 638-2RS1 Bearing Structural Features & Performance Benefits
- Full Stainless Steel Construction: The rings, balls, and cage are manufactured from stainless steel, offering superior resistance to corrosion and enabling use in harsh environments.
- Effective Sealing: The 2RS1 contact seals effectively protect the bearing interior from contaminants like dust and moisture, while retaining the lubricant for extended service life.
- Optimized Load Capacity: The single row deep groove geometry is engineered to support significant radial dynamic load ratings (892 lbf), ensuring stable performance under load.
- Ready-to-Install & Maintenance-Free: The bearing is pre-lubricated with grease and sealed, making it a maintenance-free component that is ready for immediate installation, reducing downtime.
- Wide Temperature Range: Operates reliably within a temperature range of -30°C to 120°C, suitable for various industrial conditions.
W 638-2RS1 Bearing Typical Application Areas
This versatile bearing is commonly specified in applications requiring compact size, corrosion resistance, and reliable performance. Key sectors include:
- Food Processing & Packaging Machinery (conveyors, mixers)
- Medical and Laboratory Equipment
- Chemical Handling Pumps and Valves
- Electrical Motors and Small Gearboxes
- Various Precision Instruments and low-torque drives
